Cause and Effect/Becky

From Torg Adventure

When my eyes finally focused, I saw my sister standing there, mouth open, long ropes of cum criss-crossing her long t-shirt, one of Dad's old ones that she used for a night shirt. A few of the lines crossed her face, one of them going right across her open mouth. My fast eyes caught her tongue rolling around a pearl of cum inside it.

"Jesus, don't you knock?" I said, breaking her trance-like stare, my hand still on my throbbing cock.

"I..." she said, closing her mouth after the word came out of her mouth. She subconsciously licked her lips, smearing more of my cum around them and giving her another taste.

Aside from the normal smell of cum, I was starting to smell something else, something sweet. It took me a second to figure out what it was and then it hit me. I could smell Becky's snatch as it heated up and started to get wet. My little sister was turned on over this!

What to do with that?